MAX3232 3.0V-5.5V Dual RS-232 Transceiver
Two-channel line driver and receiver with ±15-kV ESD protection and internal charge pump for 3.0V to 5.5V operation. Meets EIA/TIA-232-F standards while operating directly from 3.3V microcontroller logic without external high voltage supplies.
Aliase:MAX3232ECD, MAX3232E, MAX3232CPE, RS232 Driver, 3.3V RS232 Transceiver
DIP-16 Top View
16 Pins
Pinout Table16
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | C1+ | Analog | Positive Terminal for Charge-Pump Capacitor 1 (0.1µF) |
| 2 | V+ | Power | +5.5V Generated Positive Charge-Pump Voltage Output |
| 3 | C1- | Analog | Negative Terminal for Charge-Pump Capacitor 1 (0.1µF) |
| 4 | C2+ | Analog | Positive Terminal for Inverting Charge-Pump Capacitor 2 (0.1µF) |
| 5 | C2- | Analog | Negative Terminal for Inverting Charge-Pump Capacitor 2 (0.1µF) |
| 6 | V- | Power | -5.5V Generated Negative Charge-Pump Voltage Output |
| 7 | T2OUT | Digital | RS-232 Driver 2 Output (EIA-232 Levels to DB9 Connector) |
| 8 | R2IN | Digital | RS-232 Receiver 2 Input (EIA-232 Levels from DB9, ±25V Tolerant) |
| 9 | R2OUT | Digital | TTL/CMOS Receiver 2 Output (Logic Level to MCU RX) |
| 10 | T2IN | Digital | TTL/CMOS Driver 2 Input (Logic Level from MCU TX) |
| 11 | T1IN | Digital | TTL/CMOS Driver 1 Input (Logic Level from MCU TX) |
| 12 | R1OUT | Digital | TTL/CMOS Receiver 1 Output (Logic Level to MCU RX) |
| 13 | R1IN | Digital | RS-232 Receiver 1 Input (EIA-232 Levels from DB9, ±25V Tolerant) |
| 14 | T1OUT | Digital | RS-232 Driver 1 Output (EIA-232 Levels to DB9 Connector) |
| 15 | GND | Ground | Ground Connection (0V) |
| 16 | VCC | Power | Supply Voltage (+3.0V to +5.5V) |